Updated build for dev containers 4

Author: mrinc

.github/workflows/buildAndPub.yml

@@ -104,7 +104,7 @@ jobs:
           input: config.json
           script: 'sort_by(.major) | reverse | group_by(.major) | map(.[0]) | sort_by(.major) | reverse | .[:3]'
 
-      - run: echo 'devcontainer_matrix=${{ steps.reparse-dev-tags.outputs.output }}' >> $GITHUB_OUTPUT
+      - run: echo 'matrix=${{ steps.reparse-dev-tags.outputs.output }}' >> $GITHUB_OUTPUT
         id: set-dev-matrix
 
   build: